Texas tornadoes

A stop sign was knocked to the ground after a tornado passed through the area in Granbury, Texas on Thursday, May 16, 2013. Ten tornadoes touched down in several small communities in Texas overnight, leaving at least six people dead, dozens injured and hundreds homeless. Emergency responders were still searching for missing people Thursday afternoon. (AP Photo/Rex C. Curry)

Heavily damaged homes are all that remain in an area in Granbury, Texas on Thursday May 16, 2013. Ten tornadoes touched down in several small communities in North Texas overnight, leaving at least six people dead, dozens injured and hundreds homeless. (AP Photo/Star-Telegram,Ron T. Ennis) MAGS OUT; (FORT WORTH WEEKLY, 360 WEST)

Homes are heavily damaged in this aerial view of Granbury, Texas on Thursday, May 16, 2013, after multiple tornados hit the area Wednesday night. Ten tornadoes touched down in several small communities in North Texas overnight, leaving at least six people dead, dozens injured and hundreds homeless. Emergency responders were still searching for missing people Thursday afternoon. (AP Photo/Star-Telegram/Ron T. Ennis)

Pam House takes photos of the damage to the town from a tornado that passed the area Wednesday night, as her daughter Melissa House looks on in downtown Ennis, Texas on Thursday, May 16, 2013. Forecasters say the tornado that claimed six lives and destroyed dozens of homes in northern Texas is believed to have had winds up to 200 mph (320 kph). Murphy's room is right where the tree landed. (AP Photo/The Dallas Morning News, Vernon Bryant) MANDATORY CREDIT; MAGS OUT; TV OUT; INTERNET USE BY AP MEMBERS ONLY; NO SALES$RETURN$$RETURN$

Jeremy Hulce looks through his aunt's home that was destroyed by a tornado in Cleburne, Texas, Thursday, May 16, 2013. (AP Photo/LM Otero)$RETURN$$RETURN$

Lisa Montgomery, right, hugs her nephew Jeremy Hulce as her sons Dillon Montgomery, 10, left, and Derrek Girsham look on in front of her home that was destroyed by a tornado in Cleburne, Texas, Thursday, May 16, 2013. Ms. Montgomery rode out the twister the night before in her bathtub with her 10-year-old son. (AP Photo/LM Otero)

Lisa Montgomery looks at crosses she salvaged from her home that was destroyed by a tornado in Cleburne, Texas, Thursday, May 16, 2013. Ms. Montgomery rode out the twister the night before in her bathtub with her 10-year-old son and is salvaging items with friends and family helping. Ten tornadoes touched down in several small communities in Texas overnight, leaving at least six people dead, dozens injured and hundreds homeless. Emergency responders were still searching for missing people Thursday afternoon. (AP Photo/LM Otero)

A home shows extensive damage, Thursday, May 16, 2013 in Granbury, Texas. Major storms rolled through the north Texas area Wednesday evening spawning at least one tornado. (G.J.McCarthy/Dallas Morning News/MCT)

Emergency personnel search around a crushed truck on Thursday, May 16, 2013, in Granbury, Texas, after overnight storms sparked tornadoes and caused damage to the area. (Paul Moseley/Fort Worth Star-Telegram/MCT)

Emergency personnel look through debris on near Granbury, Texas on Thursday, May 16, 2013. Ten tornadoes touched down in several small communities in Texas overnight, leaving at least six people dead, dozens injured and hundreds homeless. Emergency responders were still searching for missing people Thursday afternoon. (AP Photo/Rex C. Curry)$RETURN$$RETURN$

Only the concrete foundation is left of this home on Thursday, May 16, 2013, in Granbury, Texas, after overnight storms sparked tornadoes and caused damage to the area. (Paul Moseley/Fort Worth Star-Telegram/MCT)

This aerial photo shows a damaged home among debris field Thursday, May 16, 2013 in Granbury, Texas. Ten tornadoes touched down in several small communities in Texas overnight, leaving at least six people dead, dozens injured and hundreds homeless. Emergency responders were still searching for missing people Thursday afternoon. (AP Photo/The Dallas Morning News, G.J.McCarthy) MANDATORY CREDIT; MAGS OUT; TV OUT; INTERNET USE BY AP MEMBERS ONLY; NO SALES

Searchers working the Rancho Brazos neighborhood in Granbury , Texas, try to coax a mother dog to them while searching for unaccounted residents, Thursday, May 16, 2013. Ten tornadoes touched down in several small communities in North Texas overnight, leaving at least six people dead, dozens injured and hundreds homeless. (AP Photo/The Fort Worth Star-Telegram, Paul Mosley) MAGS OUT; (FORT WORTH WEEKLY, 360 WEST);

This aerial photo shows television news crews and first responders lining a street Thursday, May 16, 2013 in Cleburne, Texas. Ten tornadoes touched down in several small communities in Texas overnight, leaving at least six people dead, dozens injured and hundreds homeless. Emergency responders were still searching for missing people Thursday afternoon. (AP Photo/The Dallas Morning News, G.J.McCarthy) MANDATORY CREDIT; MAGS OUT; TV OUT; INTERNET USE BY AP MEMBERS ONLY; NO SALES

This aerial photo shows a neighborhood with extensive damage caused by Wednesday's tornado in Granbury, Texas on Thursday, May 16, 2013. Ten tornadoes touched down in several small communities in Texas overnight, leaving at least six people dead, dozens injured and hundreds homeless. Emergency responders were still searching for missing people Thursday afternoon. (AP Photo/The Dallas Morning News, G.J.McCarthy) MANDATORY CREDIT; MAGS OUT; TV OUT; INTERNET USE BY AP MEMBERS ONLY; NO SALES

Searchers working the Rancho Brazos neighborhood in Granbury, Texas, look for unaccounted residents, Thursday, May 16, 2013. A rash of tornadoes slammed into several small communities in North Texas overnight, leaving at least six people dead, dozens more injured and hundreds homeless. (AP Photo/The Fort Worth Star-Telegram, Paul Moseley) MAGS OUT; (FORT WORTH WEEKLY, 360 WEST)

Crushed autos sit amid the rubble of destroyed homes as emergency personnel continue search efforts to locate unaccounted for people in the Rancho Brazos neighborhood in Granbury, Texas, Thursday, May 16, 2013. A rash of tornadoes slammed into several small communities in North Texas overnight, leaving at least six people dead, dozens more injured and hundreds homeless. (AP Photo/The Fort Worth Star-Telegram, Paul Moseley) MAGS OUT; (FORT WORTH WEEKLY, 360 WEST)